var express = require('express');
var path = require('path');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var dust = require('express-dustjs');
var session = require('express-session');
var MongoStore = require('connect-mongo')(session);

var settings = require('./settings')
var routes = require('./routes/routes');

//mongo start
require('./common/mongo-base');

var app = express();

// Dustjs settings
if (app.get('env') != "development") {
  app.enable('view cache');
  console.log("Dust view cache enabled");
} else {
  app.disable('view cache');
  console.log("Dust view cache disabled");
  dust._.optimizers.format = function (ctx, node) {
    return node;
  };
}

// Define custom Dustjs helper
dust._.helpers.demo = function (chk, ctx, bodies, params) {
  return chk.w('demo');
}

// Use Dustjs as Express view engine
app.engine('dust', dust.engine({
  useHelpers: true
}));

// view engine setup
app.set('view engine', 'dust');
app.set('views', path.join(__dirname, 'views'));

//app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(session({
  secret: settings.cookieSecret,
  key: settings.db,//cookie name
  cookie: {maxAge: 1000 * 60 * 60 * 24 * 30},//30 days
  store: new MongoStore({
    db: settings.db,
    host: settings.host,
    port: settings.port
  })
}));

app.use('/', routes);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


module.exports = app;
